Broken Strings

So I was warming up right before my match with my doubles partner. I was hitting beautifully, serving great, and I was in a rythym. Then we did introductions for the players. Then me and my doubles partner started warming up with our opponents and what do you think happens? MY STRINGS BREAK!

I had to use someone elses racket. Excuse the spelling mistakes by the way. The racket I had to use I did terrible with. I lost my rythym, my forhand was terrible. I just couldn't hit.

Should I have been able to hit just as good as I did with my original racket or does it matter if your used to the racket or not?